Function.prototype.newBind = function (target) {
    //grguments[0]
    target = target || window;
    //this-> show
    var self = this;
    //截取从1到末尾的数组
    // var args = Array.prototype.slice.call(arguments,1);
    var args = [].slice.call(arguments, 1)
    return function () {
        return self.apply(target, args)
    }
}